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F. M. HAZLETON;

DEVICE FOR TURNING WRIST PIN$.

(Ho MOdQL) Patented July 3, 1888.

[V INVENTOR:

772 Jye TORNBYS WITNESSES UNITED STATES PATENT OFFICE.

FRANCIS M. HAZLETON, OF RED BLUFF, CALIFORNIA.

DEVICE FOR TURNING WRIST-PINS.

SPECIFICATION forming part of Letters Patent No. 280,471, dated July 3,1883.

Application filed September 24, 1881.

To all whom it may concern:

Beit known that I, FRANCIS M. HAZLETON, of Red Bluff, in the county ofTehama and State of California, have invented a new and Improved Devicefor Turning Wrist-Pins, of which the following is a full, clear, andexact specification.

The object of my invention is to furnish a simple and efficient deviceby which the wristpins of crank wheels and shafts can be trued or turneddown.

The invention consists in bearing blocks or boxes fitted with cutters,which blocks are to be applied to the wrist-pin and the shaft or wheelthen revolved, as hereinafter described and claimed.

Reference is to be had to the accompanying drawings forming part of thisspecification, in which similar letters of reference indicatecorresponding parts in both the figures.

Figure 1 is a perspective view of a half-box having cutters inaccordance with my invention; and Fig. 2 is a cross-section of thecomplete box.

The half-boxes or brasses A are of any usual construction, adapted totake the place of those in use on the wheel or crank. To this end thesehalfboxes A are made to correspond externally to the form of the boxesin which the 0 journal to be trued up regularly runs, so that same as itusually revolves in its own box;

Thus a separate cutter-box will be required in each case, unless where asystem ofj ournals and boxes are duplicated, as is usually the case inengine building. The inner or bearing face of each half-box is formedwith a longitudinal groove, and in these grooves are fitted bars a,

(No model.)

of steel, that are formed on their outer faces with diagonal cuttingedges 6, projecting slightly beyond the face of the boxes.

In use the boxes A are to be put in. place on the wrist-pin and keyedtightly. The crank is then to be revolved by hand, and the boxes set upfrom time to time until the pin is turned true. \Vith locomotives thecutterboxes A are to be applied in the regular box bearings and theengine run on the track or the wheel raised and revolved by hand orpower.

This device is simple, inexpensive, and efficient. By its use the laborof removing a wheel or shaft when the pin becomes worn is saved.

I am aware that cutter-boxes similar to mine have before been used fortruing up journals by revolving the box on the journal, the box beingheld by an independent clamping device in no way dependent on the usualbox-bearings of said journal, and this I do not claim; but

What I claim, and wish to secure by Letters Patent, is-

1. A box made in two halves corresponding externally to theform anddimensions of the box of the journal to be trued up, and internally.provided with two sets of cutting-edges to each half-box, as shown, saidbox being adapted to be secured in the bearing usually occupied by theregular journal-box, for the purpose of truing said journal whilerevolving therein, as described.

2. The cutter-box A, in two parts, shaped externally to fit the bearingsin which the box of the journal to be trued up rests, having 1011-.

gitudinal grooves in its semi-cylindrical inner face, provided with thecutters a 12, secured in said grooves, as shown and described.

FRANCIS MARION HAZLETON. Witnesses:

J USTUS W. HAMILTON, CHARLES LARSON.

